6th Avenue Subway Construction, 53rd Street.

6th Avenue Subway Construction, 53rd Street.

6th Avenue Subway Construction, 23rd Street.

6th Avenue Subway Construction, 23rd Street.

6th Avenue Subway Construction, 23rd Street.

6th Aveune Subway Construction, 32nd Street.

6th Avenue Subway Construction, 32nd Street.

6th Avenue Subway Construction, 32nd Street.

6th Avenue Subway Construction, 32nd Street.

6th Avenue Subway Construction, 32nd Street.

6th Avenue Subway Construction, 23rd Street.

6th Avenue Subway Construction, 23rd Street.

6th Avenue Subway Construction, 46th Street.

6th Avenue Subway Construction, 46th Street.

6th Avenue between 33rd and 34th Streets.

6th Avenue Subway Construction, 32nd Street.

6th Avenue Subway Construction, 48th St.

6th Avenue Subway Construction, 48th Street.

6th Avenue Subway Construction, 48th Street.

6th Avenue Subway Construction, 40th Street.